Improvement in lock and latch combined



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I Specification aiming m of LettersPatent mills 4.674. dated November 28,1816 applicatio i 'filedi' 1 November 24,1875.

In order toenable others'skilled in the art to which my invention appertains to make and use the same, I will now proceed, to,describe its construction and operation, referring to the annexed drawings,-whicl1' form a part of this specification, andwhich represent various forms of my look, all embodying the same principle.

Figure 1 is an interior view of my lock, showing the boltin position when used as a latch. Figs. 2 and 3 are sections of the same. Fig. 4 shows the bolt in the locked position. Fig. 5 is a section of Fig. 4. Fig. 6 represents the key. A

A represents an ordinary look-case; and B is the bolt, which also acts as a latch. C is a spiral spring, fastened to the lock-case at one end, and having its other end, a, straightened and passed through a projection, b,,on the under side of the bolt, with a loop formed in the wire on the other side of said projection, to keep the bolt with a certain tension in the position shown in Fig. 1. The spring 0 is prevented from drawing out the bolt any farther by the tumbler D bearing against a shoulder,

11 formed by cutting a recess, d, in the top of the bolt, as shown in Fig. 1. By means of the knobs on the sides of the'door, the bolt may, however, be moved back, so that the door,

\ y l 1 l r looking'maybe done versing the operation. y I To look the bolt from the outside,"the tum; blerl) mi 's e l ne y' k y. en i ti fe 'simplyof a flat piec'e'of iron,beveled at' "its forward end. This key is introduced through a suitable key-guide and key-hole jwith the key'enters as a wedge under the'tumbler and lifts the same. To facilitate this the edge of thetumbler'is rounded. A'ssoon asfthetum .0 shifts the bolt slightly'forward',as much as the slot (1 will permit, said slotbei'ng for that purpose made a little wider than the thickness of the key. The tumbler can then not drop back into the recess d; but after the key is withdrawn it rests on the top of the bolt, which can then be moved forward by the knob E until'the tumbler drops intothe recess h and locks the bolt.

To unlock the door, the key G is again inserted and the tumbler lifted; and the bolt must then be moved very little inward, so that when the key is withdrawn the tumbler will not fall back into the recess h. This is accomplished by means of a small rabbet, k, on the under side of the key, ending in a sloped shoulder, '5. This shoulder presses against the back or right-hand side of the small recess h in the bottom of the recess h, and thereby moves the bolt sufficiently for the purpose designed. A small slide, m, arranged'in front of the keyhole is lifted'by the key in the same manner as the tumbler.

To prevent the tumbler from being lifted by other means than the proper key, there is a from the inside re;

beveled edge upward, so that the endof the b p t y i d by h ev';th sprine' 2SheetsSheet Z.-

Patented Nov.Z8,1 876.

INVENTOR N, PETERS. PHOTO-UTHOGRAFNER. WA Sl-HNGTON, D C.

novel construction and arrangement of a lock,

'tumbler D out of the recess d and above the as the slot 0 and stud f will permit. When UNITEDQSTATES thu'eo s'r a; Krtmxt, J

v mi oy it tee iut lities 1 will i Specification forming part ornat r ratmit nods 4.87 1, mari a e. eai-sie application uled' f f; W

, ,November'24. 1875. i

To all'whom it, concemk Belt known that I, AUGUST.W, O. KLEINAU, ofHamburg, Germany', have invented Im provements in Locks, of which the following is a specification: Y

The nature of my invention consists IinIthe as will be hereinafter .more'fullysetforth. V

In order toenable others "skilled in the art to which my invention appertains to make and use the same, I will now proceed to,.describe its construction and, operation, referring; to the annexed drawings, which form a part of this specification, and which represent various forms of my lock, all embodying the same principle.

Figure 1 is an interior view of my lock, showing the boltin position when used as a latch. Figs. 2 and 3 are sections of the same. Fig. 4 shows the bolt in the locked position. Fig. 5 is a section of Fig. 4. Fig. 6 represents the key. V p

A represents an ordinary lock-case; and B is the bolt, which also acts as a latch. G is a spiral spring, fastened to the lock-case at one end, and having its other end, a,- straightened and passed through a projection, b, on the under side of the bolt, with a loop formed in the Wire on the other side of said projection, to keep the bolt with a certain tension in the position shown in Fig. 1. The spring 0 is prevented from drawing out the bolt any farther by the tumbler D bearing against a shoulder, (1 formed by cutting a recess, d, in the top of the bolt, as shown in Fig. 1. By means of the knobs on the sides of the-door, the bolt may, however, be moved back, so that the door, having simply been latched, may thereby beopened. The knobs having been released, the spring 0 will again draw the bolt forward to the fixed point. The bolt is beveled at its forward end, as is usual with the latch.

To look the door, it is necessary to raise the shoulder d. This can be done from the inside by means of a small knob, E, when the bolt can be moved outward by the knob E as far the bolt has arrived at this point the tumbler will drop down into another recess, h, in the top of the bolt, and fasten the bolt. The un- PATENT:

1ckingmy beam from the msas'tyag versing the operationl, i g

To lock the bolt from the outside,'*'the A blerD ust be lifted'by key, 'e,-c s mg simply of afla't' piece'of -iron,beveled atfits forwardendf This'key is introduced through a' suitable key guide and key-holei'with the beveled edge upward, so that the endofjthe,

keyenters as a wedge under the tumblerand lifts "the same. To facilitatethisthe edge of the tumbler'is rounded. As,soonasfth'etum b e' c p ae y if d b the math -"S rin .o shifts the bolt:slightlyforward',as"much as the slot 01 will permit, said' 'slot beingfor that purpose made a little wider than the thickness of the key. The tumbler can then not drop back into the recess d; but after the key is withdrawn it rests on the top of the bolt, which can then be moved forward by the knob E until the tumbler drops intothe recess h and locks the bolt.

To unlock the door, the key G is again inserted and the tumbler lifted; and the bolt must then be moved very little inward, so that when the key is withdrawn the tumbler will not fall back into the recess h. This is accomplished by means of a small rabbet, It, on the under side of the key, ending in a sloped shoulder, 1'. This shoulder presses against the back or right-hand side of the small recess h in the bottom of the recess h, and thereby moves the bolt sufficiently for the purpose designed. A small slide, m, arranged'in front of the keyhole is lifted-by the key in the same manner as the tumbler.

To prevent the tumbler from being lifted by other means than the proper key, there is a slot, 10, cut inv the lower edge of the tumbler, a trifle narrower than the key.

To increase the security of the look, I have added several devices'-as, for example, I show in Fig. 8 the same look with three tumblers, D D D which have to be lifted at 'dificrent heights, the key being shaped accordingly, as shown in Fig. 10. The tumblers D and D have each the slot 10, as above vdescribed,'for the tumbler D, while the tumbler D has two' slots, 1) p, the tongue p remaining between the two, being the point on which the lower step of the key acts. The two small projec tions n n of the key G pass through the slots p and then one of them lifts the tumbler D Asttheisecond'or center tumbler, 1),- remains inaRI werposition than the two others, a corresponding longitudinal slot is cut in the top of the bolt, as shown by dotted lines at 9, Fig. 8; otherwise the bolt could not be moved. In case (whenthe bolt is fully locked) any one of the tumblers islifted 'too high by awron'g key or other instrument, it acts at once upon a. pivoted lever, H, above it, to move a slide, I, down behind the bolt, to prevent the latter from being pushed back. A weigh t, H, at the otherend of the lever B, keeps-it in its nonacti'n'g position. To this weighted end is connected a slide, 1', to prevent the' tumblers from being lifted, one by one, by means of a hook or other instrument, because in attempting to do this a certain pressure of the bolton the tumblers is required to support them in anelevated position, and this slide 1 prevents such pressurefrom being brought to bear on the tumblers. I r

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, isa i 1. In a lock, the combination of the bolt B,

provided'with knobs E E and recessesd d and h h, the spring G, having its straight end (1 passed through a part of the :bolt, and one or more tumblers, arranged tooperate substantially as andfor thepurposes herein set forth.

v2. In a lock having one or more tumblers, falling by gravity into recesses in the bolt,

thekeyprovided with, an inclined jshoulder, a i, to operate on the bolt to move the same slightly when the tumblers are raised, so that "they will be supported by the bolt, substantiallyas herein set forth.

3. The lever H and slides II, in combination with a recessed bolt and oneorl more tumblers, as and for the purposes herein set forth. 4. The combination of the bolt B, provided with recesses 01 h and slot 9, the tumblers D D, having slots'p, the tumbler- 1), having slots; 1)- p and tonguep, and a suitable key, all substantially as and for-the purposes hereinset forth. V a a H In testimony whereof I have signedJny name to this specification in the presence of two subscribing witnesses. a a a a a, a

U AUGUST WLQ. KLEINAU. wit nesses: j AUG. GEORG HEBBMrBEEsK,

T,R.WEINER. t 

